feat(core): clone commands and actions when binding runtimes

Add clone support across Action types and Command so commands can be safely
registered or runner-bound without mutating the original instances.

- clone BaseAction implementations across simple, composite, IO, prompt, file,
  HTTP, process, and signal actions
- bind cloned commands in Falyx.add_command_from_command() and CommandRunner
- preserve local never_prompt settings when cloning actions
- rename shared runtime state from options to options_manager for consistency
- seed root and execution option namespaces consistently
- apply scoped root and namespace option overrides during routing and dispatch
- improve namespace completion by delegating option suggestions to FalyxParser
- enrich missing-value errors and error hints

tests/test_falyx/test_run.py

@@ -7,7 +7,6 @@ from rich.text import Text
 from falyx import Falyx
 from falyx.console import console as falyx_console
 from falyx.exceptions import FalyxError
-from falyx.parser import ParseResult
 from falyx.signals import BackSignal, CancelSignal, FlowSignal, HelpSignal, QuitSignal
 
 
@@ -107,27 +106,25 @@ async def test_run_default_to_menu_help(flx):
 async def test_run_debug_hooks(flx):
     sys.argv = ["falyx", "--debug-hooks", "T"]
 
-    assert flx.options.get("debug_hooks") is False
+    assert flx.options_manager.get("debug_hooks", namespace_name="root") is False
 
     with pytest.raises(SystemExit):
         await flx.run()
 
-    assert flx.options.get("debug_hooks") is True
+    assert flx.options_manager.get("debug_hooks", namespace_name="root") is False
 
 
 @pytest.mark.asyncio
 async def test_run_never_prompt(flx):
     sys.argv = ["falyx", "--never-prompt", "T"]
 
-    assert flx.options.get("never_prompt") is False
+    assert flx.options_manager.get("never_prompt", namespace_name="root") is False
 
     with pytest.raises(SystemExit):
         await flx.run()
 
-    falyx_console.print(flx.options.get_namespace_dict("default"))
-
-    assert flx.options.get("debug_hooks") is False
-    assert flx.options.get("never_prompt") is True
+    assert flx.options_manager.get("debug_hooks", namespace_name="root") is False
+    assert flx.options_manager.get("never_prompt", namespace_name="root") is False
 
 
 @pytest.mark.asyncio
@@ -253,3 +250,70 @@ async def test_run_preview(flx):
     captured = Text.from_ansi(capture.get()).plain
     assert "Command: 'T'" in captured
     assert "Would call: <lambda>(args=(), kwargs={})" in captured
+
+
+@pytest.mark.asyncio
+async def test_run_applies_root_defaults_without_overwriting_existing_root_values():
+    child = Falyx(program="child")
+    child.add_command("D", "Deploy", action=lambda: "ok", aliases=["deploy"])
+
+    child.options_manager.set("verbose", True, "root")
+
+    root = Falyx(program="root")
+    root.add_submenu(
+        key="C",
+        description="Child Menu",
+        submenu=child,
+    )
+
+    async def fake_dispatch_route(*, route, args, kwargs, execution_args, **_):
+        assert route.namespace is child
+        assert route.root_overrides == {}
+        assert route.root_defaults["verbose"] is False
+        assert route.namespace.options_manager.get("verbose", False, "root") is True
+
+    root._dispatch_route = fake_dispatch_route
+
+    sys.argv = ["falyx", "C", "D"]
+    with pytest.raises(SystemExit) as excinfo:
+        await root.run()
+
+    assert excinfo.value.code == 0
+
+    assert child.options_manager.get("verbose", False, "root") is True
+
+
+@pytest.mark.asyncio
+async def test_run_applies_root_overrides_temporarily_and_restores_root_namespace():
+    child = Falyx(program="child")
+    child.add_command("D", "Deploy", action=lambda: "ok", aliases=["deploy"])
+
+    child.options_manager.set("verbose", False, "root")
+
+    root = Falyx(program="root")
+    root.add_submenu(
+        key="C",
+        description="Child Menu",
+        submenu=child,
+    )
+
+    seen_during_dispatch = {}
+
+    async def fake_dispatch_route(*, route, args, kwargs, execution_args, **_):
+        seen_during_dispatch["verbose"] = route.namespace.options_manager.get(
+            "verbose", False, "root"
+        )
+        assert route.namespace is child
+        assert route.root_overrides == {"verbose": True}
+        assert seen_during_dispatch["verbose"] is True
+
+    root._dispatch_route = fake_dispatch_route
+
+    sys.argv = ["falyx", "--verbose", "C", "D"]
+    with pytest.raises(SystemExit) as excinfo:
+        await root.run()
+
+    assert excinfo.value.code == 0
+    assert seen_during_dispatch["verbose"] is True
+
+    assert child.options_manager.get("verbose", False, "root") is False